Question

if a = - 2,B = 1, C = - 3,D = - 1 find the value of 2 BC + 3 CD- 4 dA + 5 ab​

Answer 1

Answer:

answer is -15

Step-by-step explanation:

2×1×(-3)+3×(-3)×(-1)-4×(-1)×(-2)+5×(-2)×(1)

-6+9-8-10

-24+9

-15

hope it helps u

Answer 2

Answer:

a=-2

b=1

c=-3

d=-1

2bc+3cd-4da+5ab

=2(1×-3)+3(-3×-1)-4(-1×-2)+5(-2×1)

=(2×-3)+(3×3)-(4×2)+(5×-2)

=-6+9-8+(-10)

=-15

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